Back then, Majin Buu was someone even Son Goku in Super Saiyan Three couldn't defeat. Even after using the Potara Earrings to fuse with Vegeta, they still got killed.
In the end, if they hadn't gathered the energy of everyone on Earth, one of the strongest life-bearing planets in the galaxy, to beat Majin Buu into reincarnation, everyone would have been finished.
Before Majin Buu emerged, he was probably only about as strong as Super Saiyan Three. He only became that monstrous after absorbing others.
With that in mind, Uchiha Hikaru quickly estimated Grand Kai's strength. If Kaioshin was a little weaker than Super Saiyan Three, then Grand Kai should have been somewhere between Super Saiyan Two and Super Saiyan Three.
There was another possibility: Grand Kai might only have had the power of Super Saiyan Two.
He definitely couldn't have been Super Saiyan Three, but whether he was exactly at Super Saiyan Two or somewhat beyond it was uncertain.
Uchiha Hikaru's current power was also slightly beyond Super Saiyan Two.
If that was the case, he really might be able to crush Grand Kai.
Seeing Uchiha Hikaru fall silent again, King Kai felt a little helpless.
He let out a sigh.
"Hey, you were the one who said we should fight. But look at you now, not even a bit..."
Before the old man could finish rambling, Uchiha Hikaru cut him off in a deep voice.
"Can you stop talking nonsense? I'm telling you, I'll fight if I have to, but I'm not sure whether my current power level of 510 million can suppress that old man. And I don't even know if my strongest move can hold up."
Unexpectedly, the moment King Kai heard Uchiha Hikaru's true power level, he froze on the spot.
After a long while,